The difference being that meatspace activism is almost pointless these days.
That mostly because most meatspace activism is like the Occupy 'Movement' - disorganized, and without a point, a plan, or an agenda. (In the rare occasions when it's not, it's a one-time affair that isn't really connected to anything else and won't have any follow on. The difference is moot really.)
And this is a real problem - because it leads people to observe those fools and assume that because their cargo cult version of activism is failure, that all activism must fail.